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Finding the Fourth Proportional to 18,868.10, 28,285.41 and 9,495.86

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Solution

The fourth proportional to 18,868.10, 28,285.41 and 9,495.86 is: 14,235.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.10 : 28,285.41 = 9,495.86 : x
  2. Step 2: Convert to fraction form
    18,868.10/28,285.41 = 9,495.86/x
  3. Step 3: Cross multiply
    18,868.10x = 28,285.41 × 9,495.86
  4. Step 4: Simplify right side
    18,868.10x = 268,594,293.40
  5. Step 5: Solve for x
    x = 268,594,293.40/18,868.10
  6. Step 6: Final answer
    x = 14,235.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.